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Plasmon-induced nonlinear response of silver atomic chains

Abstract

Nonlinear response of a linear silver atomic chain upon ultrafast laser excitation has been studied in real time using time-dependent density functional theory. We observe the presence of nonlinear responses up to fifth order in tunneling current, which is ascribed to excitation of high-energy electrons generated by Landau damping of plasmon. Nonlinear effect is enhanced after adsorption of polar molecules such as water, thanks to the enhanced damping rates during plasmon decay. Increasing the length of atomic chains would also increase the nonlinear response, favoring higher-order plasmon excitation. These findings offer new insights towards a complete understanding and ultimate control of plasmon-induced nonlinear phenomena to an atomic precision.

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Publication details

The article was received on 13 Mar 2018, accepted on 09 Apr 2018 and first published on 09 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR02086H
Citation: Nanoscale, 2018, Accepted Manuscript
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    Plasmon-induced nonlinear response of silver atomic chains

    L. Yan, M. Guan and S. Meng, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR02086H

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